Sole-stitching machine



March 9 1926. 1,575,948

' N. D. SWEET ET AL SOLE STITCHING MACHINE Filed March 14, 1922 sSheets-Sheet 1 Thomas G. drreef March 9 1926.

N. D. SWEET ET AL SOLE STITCHING MACHINE Filed March 14, 1922 3Sheets-Sheet 2 TITTElJL m 0. m7 m m w March 9 192a. 1,575,948 I N. D.SWEET ET AL SOLE S TITCHING MACHINE Filed March" 14 1922 3 Sheets-Sheet5 Thomas dU/veet Neil lldrveez '6 76W 1 Patented Mar. 9, 1926.

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NEIL 1). SWEET AND THOMAS A. SWEET, OF COLON, MICHIGAN.

SOLE-STITQHING MACHINE.

Application filed March 14, 1922. Serial No. 543,667.

1/ o all whom it may concern Be it known that we, NEIL D. SWEET andTHOMAS A. SWEET, citizens of the United States, residing at Colon,county of St. Joseph, State of Michigan, have invented certain new anduseful In'iprovements in Sole-Stitching Machines, of which the followingis a specification.

This invention relates to improvements in sole stitching machines.

Our improvements relate particularly to sole stitching machines for usein repairing shoes and we have illustrated the same as embodied in amachine design-ed for that purpose, although certain features areadaptable for use in other machines, that is, machines designed for usein manufactoring shoes.

The main objects of the invention are:

First, to provide an improved sewing machine for use in attaching orstitching soles to shoes in repair Work which is simple in structure andvery easy to operate.

Second, to provide in a machine of the class described an improved meansfor waxing the thread.

Further objects, and objects relating to structural details, willdefinitely appear fromthe detailed description to follow.

lVe accomplish the objects of our invention by-th-e devices and meansdescribedin the following specification. The invention is clearlydefined and pointed out in the claims.

A structure which is a preferred em bodiment of our invention is clearlyillustrated in the accompanying drawing, forming a part of thisapplication, in which:

Fig. I is a side elevation of a machine embodying our improvements, 2.shoe being shown in position to be operated upon by the dotted lines,the bench being partially broken away. e

Fig. II is a. detail rear elevation.

Fig. III is a. detail side elevation showing the arrangement of theparts upon. the bench.

Fig. IV is an enlarged detail of the left hand side of the machine.

Fig. V is a side elevation of one of the thread waxing receptaclespartially broken away to show structural details.

Fig. V1 is a. detail View partially in vertical section on a linecorresponding to line 66 of Fig. V.

Fig. VII is a detail section on a line corresponding to' line 77 ofFigs. 1, IV and IX, showing details of the shuttle.

Fig. VIII is a detail section on a line corresponding to line ti -8 ofFig. 'VH, showing further details of the shuttle.

Fig. TX is a front elevation of theshuttlc box supporting spring.

In the drawing similar reference charactors refer to similar partsthroughout the several views and the sectional views are taken lookingin the direction of the little arrows at the ends of the section lines.

' Referring to the drawing, the bench 1 is provided with suitable legs 2adapted to support the mechanism in convenient position for theoperator. A main supporting upright 3 is mounted upon the bench. Theframe l of the machine is secured to this upright.

At the upper end of the upright is a driving wheel 5 connected to thepower wheel 6 by the belt 7 and pulley 8. The pulley 8 is controlled bythe clutch 9 operatively connected to the foot lever 10 by the link 11.The details of these parts are not further illustrated as they form nopart of our present invention.

.T he frame at is provided. with a wor r rest 12 on which the work, as13, is supported by the operator, the work rest being in the form ofspaced projections on the frame of such dimensions as to receive theedge of the sole. The presser f'oot'lal is controlled by a mechanism,indicated generally by the numeral 15, so that it is manually raised andlowered,see Fig. IV. As the details of this presser foot controlmechanism form no part of this invention the are not further illustratedor described herein.

The needle bar 16 'is driven from the rocker 17 which is in turnoperated from the slide 18 reciprocating in the vertical slot 19 andprovided with a roller, shown by the dotted lines 20, engaging the slot21 in the rocker. The slide 18 is connected by the pitman 22 to thedriving wheel 5, so that as the wheel rotates the needle bar isre-ciprocated.

The shuttle 23 is arranged in a slnittlc box 24. and carries thetbohbin25. The shuttle is supported by a spring 26 formed integrally with thedisk 27 from which it is struck in the form of a. tongue, the springbeing bowed outwardly with its end lying inthe slot 28, so that it isnot likely to be engaged by the thread as it is looped by the shuttle,the thread passing between the spring and the spherical head 29 of theshuttle against which the spring bears as the loops are formed.

The spring has a peripheral notch or cutaway portion 30 to pass theshuttle driving lug 31,see Fig. VIII. The details of the shuttlemechanism are not illustrated as they form no part of this invention.This supports the shuttle in upright positionso that the shuttle alwayscatches the loops of the top thread formedby the needle with the partsin this upright position.

The feed lever 32 is provided with a point 33 adapted to engage the soleas it is sup ported upon the rest 12, the feed lever being oscillated bya suitable mechanism, not illustrated. The stop screw 34 limits. thereturn movement of the feed lever and, thus limiting its stroke,determines the length of the stitch.

To automatically wax the thread 85 as it passes to the needle, weprovide a receptacle 36 through which the thread is carried as it passesfrom the spool 37 to the take-up mechanism, designated generally by thenumeral 38. This receptacle is provided with a guide member 39 having aneye 40 at its lower. end through which the thread is passed as it isunwound from the spool, the thread being then passed through the eye 41at the top of the guide member and from thence through a hole 42 in theclosure or plug 43 for the receptacle 36. This closure carries a threadguide 44 of U-shape having eyes 45 and 46 formed therein, the eye 45being at the lower end of the guide and below the level of the wax sothat the thread is carried down into the wax and in pass ing throughthis eye the fibres of the thread are spread or opened so that the waxeffectively penetrates and thoroughly waxes the thread. The eye 46 isabove the level of the wax so that it serves as a wiper wiping off theexcess from the surface of the thread. The thread passes from the eye 46.through the closure plug to the take-up mechanism, as described. Theplug or closure is retained in the receptacle by the pin 47, there beingconsiderable strain or pull on the thread as it is drawn through thereceptacle. 1

To give tension to the thread a tension spring 48 is provided which isadjustably mounted on the frame with its free end bearing against thethread on the spool. The adjusting screw 49 is provided to regulate thetension of this spring and through it the tension of the thread. i j

A similar wax receptacle, designated by the numeral .50, is mounted onthe bench so that as the thread is wound upon the bobbin 25 the threadmay be passed through the horizontal position and the operator mak-' ingthe stitches by manually reciprocating the parts corresponding to the'sllde 18.

This is laborious work and very rapid work is not possible. Itisalsonecessary to hold the work 1n an unnatural and inconvenient position andin a position 1n whichit is quite ditlicult for the operator to properlyinspect the work.

Our improved machine enables very rapid work and work of high qualityand also with a minimum of labor on the part of the operator. 7 1

lVe have illustrated and described our improvements in anembodimentwhich we have found very satisfactory. e have not I attemptedto illustrate or describe. certain modifications and adaptationswhichmight be desirable in general manufacture, as we,

believe the disclosure made will enable those skilled in the art towhich this invention relates to embody or adapt the same as may bedesired.

Having thus described our invention, what we. claim as new and desire tosecure by Letters Patent, is:

1. In a structure offlthe' class described, the combination with asupporting upright, a driving wheel mounted at the top thereof, a sewingmachine comprising a frame, work rest, presser foot, needle-bar,shuttle, said i frame being mounted on said upright'below said drivingwheel, and means for operating said needle-bar comprising a rockermember operatively associated therewith, a slide verticallyreciprocating on said frame, a

pitman connecting said slide to said driving wheel, and a 'roller onsaid slide, said rocker member being slotted to coac t with said roller.

2. In a structure of the class described, 1

the combination with a supporting upright, a driving wheel mounted atthe top thereof, a sewing machine comprising a frame, work rest,pre'sser foot, needle-bar, shuttle, said frame being mounted on saidupright below said driving wheel, and means for operating saidneedle-bar comprising a slide vertically reciprocating on said frame andoperatively associated with said needlebar.

In witness whereof, we havehereunt-o set our hands and seals.

NEIL n. swnnr. as THOMAS A. SWEET. 1. s.]

